101002122122021 has 4 divisors (see below), whose sum is σ = 101002192022700. Its totient is φ = 101002052221344.

The previous prime is 101002122121933. The next prime is 101002122122089. The reversal of 101002122122021 is 120221221200101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40813060020100 + 60189062101921 = 6388510^2 + 7758161^2 .

It is a cyclic number.

It is not a de Polignac number, because 101002122122021 - 2²² = 101002117927717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101002122122221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32736176 + ... + 35688393.

It is an arithmetic number, because the mean of its divisors is an integer number (25250548005675).

Almost surely, 2^{101002122122021} is an apocalyptic number.

It is an amenable number.

101002122122021 is a deficient number, since it is larger than the sum of its proper divisors (69900679).

101002122122021 is an equidigital number, since it uses as much as digits as its factorization.

101002122122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69900678.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 101002122122021 its reverse (120221221200101), we get a palindrome (221223343322122).

The spelling of 101002122122021 in words is "one hundred one trillion, two billion, one hundred twenty-two million, one hundred twenty-two thousand, twenty-one".